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Electromagnetic Waves 8th Grade
  • 1. Global Positioning System signals can tell you
A) your exact location on Earth
B) how many satellites are in orbit
C) what television station you are tuned to
D) who is sending a message to your cellphone
  • 2. Which waves have some electrical properties and some magnetic properties?
A) longitudinal waves
B) electromagnetic waves
C) mechanical waves
D) transverse waves
  • 3. Electromagnetic waves can transfer energy without a(n)
A) change in either a magnetic or an electric field
B) electric field
C) magnetic field
D) medium
  • 4. The range of electromagnetic waves placed in a certain order is called the
A) electromagnetic frequency
B) electromagnetic field
C) electromagnetic spectrum
D) electromagnetic wavelength
  • 5. Which model of light helps explain the photoelectric effect?
A) the wave model
B) the electromagnetic model
C) the polarizing model
D) the particle model
  • 6. FM signals travel as changes in
A) the frequency of the wave
B) the amplitude of the wave
C) the speed of the wave
D) the loudness of the wave
  • 7. On AM broadcasts, what remains constant?
A) the frequency
B) the music
C) the amplitude
D) the speech
  • 8. Which electromagnetic waves have the longest wavelengths and lowest frequencies?
A) gamma rays
B) infrared waves
C) ultraviolet waves
D) radio waves
  • 9. Light that has passed through a polarizing filter is called
A) polarized light
B) photoelectric light
C) white light
D) transverse light
  • 10. Visible light can be separated into various colors to form a(n)
A) thermogram
B) MRI
C) X-ray picture
D) spectrum
  • 11. What kind of waves do cellular telephones use to transmit and receive signals?
A) ultraviolet rays
B) gamma rays
C) microwaves
D) infrared rays
  • 12. The images made by an infrared camera are called
A) thermograms
B) magnetic resonance images
C) ultraviolet images
D) X-rays
  • 13. In the phenomenon known as the _________, electric current will flow when light shines on certain substances.
A) photoelectric effect
B) electromagnetism
C) electromagnetic spectrum
D) electricity
  • 14. Which letter shows the type of wave that can be seen by the human eye?
A) C
B) D
C) A
D) B
  • 15. What is the name of the type of wave labeled C?
A) infrared rays
B) visible light
C) ultraviolet rays
D) radar
  • 16. Which letter indicates X-rays?
A) A
B) B
C) C
D) D
  • 17. What type of wave that has the highest frequency?
A) infrared rays
B) gamma rays
C) microwave
D) x-rays
  • 18. What type of wave that has the the greatest energy?
A) x-rays
B) microwave
C) gamma rays
D) infrared rays
  • 19. What type of wave is labeled A?
A) radio
B) visible light
C) infrared
D) ultraviolet
  • 20. What is the object labeled as A?
A) communications satellite
B) ground receiver
C) ground transmitter
D) radio waves
  • 21. What is the object labeled B?
A) radio waves
B) ground receiver
C) communications satellite
D) ground transmitter
  • 22. What is the object labeled C?
A) ground receiver
B) communications satellite
C) radio waves
D) ground transmitter
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